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Foundation & Bunkie Board

Better than a box spring, our foundation and bunkie board add optimal support & durability

45k Saatva Reviews
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Complete your sleep upgrade by ditching your old box spring for our premium mattress foundation or a low-profile bunkie board.

Our steel Universal Frame (sold separately) supports and lifts your foundation and mattress 7.5" off the ground. Mattress cannot sit directly on the Universal Frame without a foundation.

Pair with a mattress and get an extra $30 offDiscount Banner

Features & Benefits

  • Handcrafted from North American spruce, making it more durable than a traditional box spring
  • CertiPUR-US® foams, and a cover made with organic cotton for optimal breathability
  • Rounded corners create a seamless look with your Saatva mattress


  • Twin - 38" X 75"
  • Twin XL - 38" X 80"
  • Full - 54" X 75"
  • Queen/Split - 60" X 80"
  • King/Split - 76" X 80"*
  • Cal King/Split - 72" X 84"*
*King and Cal King foundations come as a split design for ease of delivery and setup. This does not affect the feel or performance of the foundation or bunkie board under your mattress.


  • certified memory foam

Foundation Compatibility

Standard (non platform) bed framePlace on a standard bed frame and pair with any mattress for added bed height
Universal frame*Place on the steel universal frame (sold separately) for a minimal bed setup

Bunkie Board Compatibility

Standard (non platform) bed framePlace on a standard bed frame by itself for a lower bed height or over an older box spring that needs added support
Slatted platform bed framePlace a bunkie board over the slats to create a stronger, solid surface for dual-sided mattresses like our Zenhaven or heavier foam mattresses that require added support
Universal frame*Place on the steel universal frame (sold separately) for a minimal, low-profile bed setup
Bunk beds, loft beds & day bedsPlace on bunk, loft, or day beds to add support without adding a lot of height
*Universal Frame (sold separately) supports and lifts the foundation or bunkie board and mattress 7.5" off the ground. Mattress cannot sit directly on the Universal Frame without a foundation.

Upgrade your bed setup with our premium foundation or bunkie board

Woman sitting on bed

Designed to be an elevated take on traditional box springs and bunkie boards, our foundations and 2” bunkie board maximize the comfort and lifespan of your mattress.

Durable support

  • Premium quality materials provide a stable surface for your mattress
  • Optimal support promotes proper spinal alignment and even weight distribution to prevent sagging over time
  • Maximizes comfort and prolongs the lifespan of your mattress

Healthier sleep

  • Eco-friendly certified foams produce lower volatile organic compounds (VOCs) for healthier indoor air quality
  • Cover made with the same organic cotton as our luxury mattresses

Handcrafted in the U.S.

  • Proudly made to order in our network of 14 U.S. factories, just like our luxury mattresses
  • Domestic factories cut down on the overall carbon footprint from manufacturing to delivery

  • Saatva mattress foundation and bunkie board come in all standard U.S. sizes:

    TWIN: 38" x 75"

    TWIN XL: 38" x 80"

    FULL: 54" x 75"

    QUEEN/SPLIT: 60" x 80"

    KING*/SPLIT: 76" x 80"

    CAL KING*/SPLIT: 72" x 84"

    * King and Cal King foundations and bunkie boards come as a split design for ease of delivery and setup. This does not affect the feel or performance of the foundation or bunkie board under your mattress.

    Mattress foundation comes in two heights:

    • 8.75" - pairs well with lower profile mattresses (11.5" or lower)
    • 4.75" - pairs well with standard profile or higher mattresses* (12" or higher)

    Note: the combination of a thicker mattress (like the 14.5" Saatva Classic) and the 8.75" foundation may be too tall for some people.

    • Each foundation slat is 3" wide.

    • Twin, Twin XL, and Full foundations have 5 slats evenly spaced apart.

    • Queen, King and Cal King foundations have 7 slats evenly spaced apart.

    Bunkie board comes in one low-profile 2" height:

    • Pairs well with slatted platform beds, bunk beds, loft beds, and day beds

    • Can also be used with the minimal Universal Metal Frame (sold separately)

  • Every Saatva mattress foundation and bunkie board is crafted when you order it. We assemble each one in America with care and pride, using only the highest quality, globally sourced materials. We could have settled on cheaper materials and produced our products elsewhere for higher profits, but we've never wavered in our commitment to quality. We believe it's the right thing to do for our customers, our American workers, and our economy.

  • Every Saatva mattress foundation and bunkie board features:
    • Cover made with organic cotton
    • CertiPUR-US® certified foams that meet their standards for health and environmental safety

  • Sit back and relax while we do all the work. Our free white glove delivery includes in-room delivery and set up. We'll even take away your old mattress at no additional cost to you. Just select free mattress removal at checkout.

  • At Saatva, we never pressure you to make up your mind quickly. Our mattress foundation and bunkie board come with a 365-night home trial, so you have plenty of time to decide whether it’s right for you. If at any point during your home trial you’re not satisfied, just give us a call and we’ll come pick up the foundation or bunkie board and refund your money, less a $99 processing fee to cover our cost of gas and labor for the pickup. That’s it.

  • A foundation can be covered in fabric or have an exposed wood frame, with a solid top or one made of wood slats.The main purpose of a mattress foundation is to raise your sleeping surface to a comfortable height and give your mattress optimal support.

  • In the past, box springs used to be made of wood and filled with metal coils to add a springy flexibility and cushioning to the thin, stiff mattresses of those days. Nowadays, what some people still call "box springs" are more accurately called mattress foundations or bed foundations. They don't contain metal springs anymore, but serve the same purpose of making your bed setup more comfortable and supportive.

  • Saatva offers two foundation heights, 4.75" and 8.75." There is no difference in quality or performance between the two heights; the choice is a matter of personal preference and the overall height of the bed setup you want. One consideration is whether you plan to use your existing bed skirt. The "drop" on a standard bed skirt is 14" to 15," which works with the 8.75" foundation and a standard 7" bed frame.

  • Yes, you can order a split queen foundation to make delivery easier if you have an especially narrow staircase or hallway in your home. There is no difference in comfort or quality between a split queen foundation and regular foundation. Note: A split foundation is standard on king and California king sizes.

  • A bunkie board is similar to a foundation in that its main purpose is to add support and prolong the life of your mattress. The difference between the two is mainly height.

    A bunkie board is ideal for not only bunk beds (for which it was first invented), but also for all other bed setups that need added support without adding too much height. Use a bunkie board over a slatted platform bed frame, and older box spring, loft beds, day beds, and even trundle beds.

    Note that if you already have a platform bed with a solid surface or if you use an adjustable base, you do not need a bunkie board or foundation as those bed setups already give adequate support to your mattress.

  • Yes. A bunkie board is designed to give added support between your mattress and the bed frame it sits on.

  • No. A platform bed with a solid or slatted surface doesn't require the addition of a mattress foundation. Always check your mattress specifications to make sure your bed setup works with your new mattress.

  • Deciding whether you need a Saatva foundation or box spring for your new mattress depends on the kind of bed you plan on using (platform beds, for example, don't need a foundation), your existing mattress foundation or box spring, and whether or not you plan to use an adjustable base.

    You will need the Saatva box foundation if:

    • Your existing foundation or support system is more than 7 years old.
    • Your existing support creaks, has soft spots, or is damaged in any way.
    • You want a foundation designed to support your specific mattress. Our Saatva HD, for example, requires pairing with our HD foundation for optimal support.
    • You want a foundation that matches your mattress. We use the same organic cotton blend cover for the Saatva box foundation as we do for our mattresses.

    You won't need the Saatva box foundation if:

    • You purchased a mattress support system within the last 7 years.
    • Your existing foundation is in good condition and provides sturdy center support.
    • You don't mind not having matching foundation.
    • You have a platform bed, which does not require a foundation.
    • You have an adjustable base, which takes the place of a foundation or box spring.

    To learn more about choosing the right support system for your mattress, see our article on mattress foundations.

  • Some people use what's called a bunkie board under their mattress to give it additional support. This a thin piece of material, often plywood or particleboard, that can be used with any type of bed setup, whether it's an old box spring, foundation, or a slatted platform bed frame. You don't need to add a plywood support on our Saatva mattress foundation as it already provides the optimal support your mattress needs.

  • Yes. Our steel Universal Frame has a plate at the top for headboard attachments. Please check with the manufacturer of your headboard to make sure it's compatible with standard metal frames.

  • Foams that are CertiPUR-US®* certified are guaranteed to be low in volatile organic compounds (VOCs), so you don’t have to worry about off-gassing odors. CertiPUR-US certified foams are also guaranteed to be free of ozone depleters, PBDEs, TDCPP, and TCEP flame retardants, mercury, lead, and other heavy metals, formaldehyde, and phthalates.

    *CertiPUR-US® is a registered trademark of the Alliance for Flexible Polyurethane Foam, Inc.

  • White glove delivery is the Saatva service standard and comes free with every mattress, bedroom furniture, and rug order. While our teams don't actually wear white gloves, we do all the work for you.

    We hand-deliver your mattress and set it up in the room of your choice. We also take away your old mattress and foundation* if you select the "free mattress & foundation removal" at checkout—all at no extra charge!

    Typically, mattress orders are delivered from our factories within a 9-21 day time frame, depending on your zip code.

    Our bedroom furniture is also hand-delivered and assembled (if applicable) and bedroom rugs are delivered and set up in the room of your choice (rug area must be cleared of furniture by customer prior to delivery). You get all this for free as part of our premium white glove delivery service.

    *Note that our delivery teams won't take away the following items:

    • Waterbed bases

    • Standard metal bed frames

    • Sleep Number bases

    • Stained and/or damaged mattresses & foundations/box springs

  • Our mattress foundation comes with a lifetime warranty. View the mattress foundation warranty page for details.

  • We offer a year-round $225 discount off orders of $1,000 or more to active military, veterans, first responders, government employees, nurses, teachers, senior citizens & students. To apply the discount, simply click on the "Discount for first responders & more" box at checkout. You will be prompted to register with to verify your status and receive the discount. Note that your cart will automatically apply the larger discount if there is a promotional sale on that is better than your discount.

    We also occasionally offer promotional sales for limited time periods on our products on and Saatva Viewing Rooms. To be one of the first to learn about our latest sales, sign up for our mailing list at our site footer or text BED to SAATVA (722882). You can unsubscribe at any time.

Don't just take our word for it

Saatva has earned an A+ rating from the Better Business Bureau and 96% of Saatva customers are satisfied with their purchase**.See for yourself why we have the highest customer review ratings in the mattress industry.

*From a recent Saatva customer satisfaction survey, which we conduct on a regular basis to ensure service, product, and overall quality standards.
**Based off Saatva return rates.

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